Cat Simulator originally was released as a single-player title where you run around as a cute kitten who runs around exploring a massive house and outside into the gardens. There's a variety of different cats you can play as, and even dress them up in their own outfits, should you be into that sort of thing.
Obviously there's a lot more to the game than just running around a house and dressing the cats up in outfits, but that's the quick and dirty explanation of Cat Simulator. The newest update, however, changes the entire dynamic of this game, bringing online multiplayer into the mix. Now you can be a cute kitten alongside a number of other people who are also playing as cute kittens.
With the addition of multiplayer, there are also a number of new locations for players to explore and a bunch of objects you can destroy, as only a proper kitten can do. Players will also be able to interact with a number of NPCs in the form of humans and other cats. Luckily, all of this is rounded out with the addition of more outfits. If you know other people who play this game, you can invite them to join you at a specific location, so they don't have to run the entire way there to meet up with you.
For those of you who play Cat Simulator, you can now download this update off of Google Play for free. If you don't have this game installed but want to check it out, it is available for free as well.